each elements need a unique id because this is needed in the configuration!

Then you have to insert the following Javascript to your page:

<script type="text/javascript">
function getTFUFormData(fields) {
var validateOk = true;
var spacer = String.fromCharCode(4);
// You have to return doNotUpload if you e.g. have mandatory fields and they are not filed.
// add the check to this function and return 'doNotUpload'. Then the upload is not started.
// noone should enter this
var doNotUpload = String.fromCharCode(5) + String.fromCharCode(4) + String.fromCharCode(5);